And one of my favorite lines of all time:

The easiest way to avoid getting lost is to stay found!

That means tracking where you are on a regular basis, and comparing it to what you see, to make sure that your GPS, map and compass aren't deceiving you.
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963